Repeat Exercise 3 by assuming that weights of cars have a standard deviation known to be 520

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Repeat Exercise 3 by assuming that weights of cars have a standard deviation known to be 520 lb.

Repeat Exercise 3

When planning for construction of a parkway, engineers must consider the weights of cars to be sure that the road surface is strong enough. A simple random sample of 32 cars yields a mean of 3605.3 lb and a standard deviation of 501.7 lb (based on Data Set 16 in Appendix B). Use a 0.01 significance level to test the claim that the mean weight of cars is less than 3700 lb. When considering weights of cars for the purpose of constructing a road that is strong enough, is it the mean that is most relevant? If not, what weight is most relevant?

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Elementary Statistics

ISBN: 9780321500243

11th Edition

Authors: Mario F. Triola

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